The Stupendous Sandwich of Chungella IV was renowned as the largest sandwich in the galaxy until its consumption. It was bought (or possibly stolen) by the Bloogs of Fribbulus Xax in Keen 6. They were told its whereabouts in exchange for kidnapping Molly McMire[1], the babysitter of Commander Keen, in order to distract him from a plot to blow up the universe[1].

Keen, once seeing it, remarks that it is the second biggest sandwich he has ever seen. Where he has seen a larger one remains untold. This is possibly a reference to the Lucas Arts game The Secret of Monkey Island, as the line "That's the second biggest _____ I have ever seen" is used as a running joke[2].

The sandwich is hidden in the top right corner of Bloogfoods, Inc., and when obtained, can be fed to the Grabbiter in exchange for a secret. The secret is that the Grabbiter will fall asleep after a big meal, thus allowing Keen to pass.